I have archeology site ... its in the desert , under 3- 9 meter of sand
its old sandstone walls , its 20 cm thickness
and there is some bronze tools
and i have some questions , i need to answer :in 2 pages
1- is there is a device or tool let me locate the bronze , gold items under 3-9 meters ?
and how accurate it is ?
whats brands name you suggest ?
2- what is the tool to locate the walls in 2d viewer and draw the structures ?
3- what is the GPR equipment which let me locate the walls with 3d viewer under 3-9 depth ?